Physical Properties

What are ionic bonds?

• weak electrostatic forces of attraction between oppositely charged ions

• strong electrostatic forces of attraction between oppositely charged ions

• strong electrostatic forces of attraction between metal and non-metal atoms

• weak electrostatic forces of attraction between metal and non-metal atoms

What exists between simple covalent molecules?

• weak intermolecular forces of attraction between molecules

• weak covalent bonds formed by sharing of electrons between atoms

• strong intermolecular forces of attraction between molecules

• strong covalent bonds formed by sharing of electrons between atoms

Select all the physical properties true for ionic compounds.

• high melting and boiling points

• low melting and boiling points

• can dissolve in water

• cannot dissolve in water

• can dissolve in organic solvents

Tags

NGSS.HS-PS1-3

Select all the physical properties true for covalent substances.

• high melting and boiling points

• low melting and boiling points

• can dissolve in water

• cannot dissolve in water

• can dissolve in organic solvents

Select all the states in which ionic compounds can conduct electricity.

• solid

• liquid / molten

• aqueous / dissolved in water

• cannot conduct electricity in all states

Select all the states in which covalent substances can conduct electricity.

• solid

• liquid / molten

• aqueous / dissolved in water

• cannot conduct electricity in all states

What is NOT a property of ionic compounds?

• high melting and boiling points

• conduct electricity in all states

• soluble in water but insoluble in organic solvents

• conduct electricity when molten or in aqueous solutions

Ionic compounds cannot conduct electricity in solid state because

• ionic bonds are strong.

• electrons are not free to move.

• ions are held in fixed positions.

• there are no charged particles.

Ionic compounds can conduct electricity in molten and aqueous states because

• electrons are free to move.

• ions are free to move.

• atoms are free to move.

• protons are free to move.

Which is a property of simple covalent molecules?

• soluble in water

• insoluble in organic solvents

• conduct electricity when molten

• low melting and boiling points